21503937

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{227}}^1\times {\mathrm{347}}^1$

素因数の和:597

約数の個数: 32

約数和(自身を含む): 35546112

約数和(自身を除く): 14042175

約数列:

[1, 3, 7, 13, 21, 39, 91, 227, 273, 347, 681, 1041, 1589, 2429, 2951, 4511, 4767, 7287, 8853, 13533, 20657, 31577, 61971, 78769, 94731, 236307, 551383, 1023997, 1654149, 3071991, 7167979, 21503937]

約数ペア:

[(1, 21503937), (3, 7167979), (7, 3071991), (13, 1654149), (21, 1023997), (39, 551383), (91, 236307), (227, 94731), (273, 78769), (347, 61971), (681, 31577), (1041, 20657), (1589, 13533), (2429, 8853), (2951, 7287), (4511, 4767)]